Affects Version/s: Minecraft 15w44b, Minecraft 15w45a, Minecraft 15w46a, Minecraft 15w47a, Minecraft 15w47b, Minecraft 15w47c
Fix Version/s: Minecraft 15w49a
Environment:OS : Windows 10 64-bit
Java 8 version : 1.8.0_65-b17 64-bit
CPU : Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz
GPU : NVIDIA GeForce GTX 650
Drivers : GeForce 358.91
If you interrupt rebirth dragon, and then start again, will make crystal overlap.
Happens when you destroy one of the ender crystals at the portal while one or more ender crystals on the obsidian pillars have already been replaced. After you restart the respawning sequence there will be multiple ender crystals at the position where before the ender crystals where already replaced.
The reason is that during the respawning sequence all ender crystals have Invulnerable:1b and if you interrupt the sequence this tag is not changed.